Feeding mechanism.



W. PIPPERT.

FEEDING MECHANISM. APPLICATION rILfifi 002', o, 1911.

1,031,195. I Patented July 2, 1912.

3 SHEETS-SHEET 1.

l l l'llia Pip Jeri W. PIPPE'RT. FICEDING MECHANISM.

AP'PLIOATION FILED 001e, 1911.

3 SHEETS-BHBET 2.

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Patented July 2, 1912.

W. PIPPERT.

FEEDING MECHANISM.

APILIOATIOH FILED 00T.6,1911.

1,031,195, Patented July 2, 1912.

3 SHEETS-SHEET 3.

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. UNITED STATES PATENT OFFICE.

WILLIS PIPP ERT, F 'RUMFORD, MAINE, ASSIGNOR TO CONTINENTAL PAPER BAGCOMPANY, OF NEW YORK, N. Y., A CORPORATION OF MAINE.

FEEDING MECHANISM.

Specification of Letters Patent.

Patented July 2 1912.

To all whom it may concern:

Be it known that I, WILLIS PIPPERT, a citi zen of the United States, anda resident of Rumford, in the county of Oxford and State of Maine, haveinvented certain new and useful Improvements in Feeding Mechanisms, ofwhich the following is a specification. I

This invent-ion relates to feeding mechanism for paper bags particularlyfor self opening square, satchel bottom or similar bags in which one endof the bottom. thereof is folded onto the body thereof.

The object of my improvements is to furnish a mechanism of the classspecified of simple construction and rapid and reliable in operation.

Other objects will appear in the description following.

The accompanying drawings illustrate the preferred form of myimprovements and- Figure l is an assembled side elevation, with thefront frantic removed. Fig. 2 is a plan view corresponding with Fig. 1.Figs. 3 to 7 inclusive are fragmentary side views illustrating steps inthe operation of my improved machine.

In the manufacture of paper bags it is often common practice andconvenient to fold the bag bottomonto the face or seamless side but ifit is desired to print upon said face or seamless side after the bag iscompleted it is necessary to reverse the fold of the bag bottom relativeto the body portion and turn the bottom onto the seam side, so as topresent an entirely unbroken surface to print upon. To do this by handis a tedious and expensive operation and I have herein illustrated meansfor thus reversing the bag bottom relative to the bag body in deliverinthe bag from a containing hopper to the cylinder of the printin press.

Rotating impression cylinc er 3 is fixed to shaft 4 .rotativelysupported in side frames 45 5, "6. Said cylinder is provided with one ormore sets of grippers as 7, 7 fixed to shaft 8 pivotally mounted incavity 9 below the face of said cylinder. Said shaft 8 projects beyondthe end of said cylinder and has gear 59 1Q fixed thereto for engagementwith gear 11 of segment 12 fixed to shaft 13 .pivoted in the end of saidcylinder. Said segment 12 has roll 14 pivotally fixed thereto betweengear 11 and pivot 13, for engagementwith fixed cam 15 coaxial withcy1inder.3. Shaft free end of said arm 16 and car 17 on the end of saidcylinder is compression spring 18. By these means said grippers 7, 7 maybe actuated to close and open to successively grip to said cylinder andrele'ase therefrom the underfolded end 40 ofthe paper bag bottom. Abovesaid'cylinder I have provided means for supporting a pile of bagscomprising forward lips 19, 19 and rearward lips 20, 20. Between saidforward and rearwa; d lips and extending crosswise'said bags andparallel with the axis of cylinder 3 is turning bar 21 downwardly aroundwhich the bag body is drawn. Said turning bar is rigidly supported atits ends by rods 38, 38 depending from brackets 39, 39 and said barpreferably has its rear edge 22 rounded so that the bag bodies will passaround it with ease. Said bar 21. also provides a center support for thepile of bags. Adjustable sidedguides 23, 230 may beprovided if desireIVhile the normal tendency-of the underfolded end 40 of the bag bottom41 is to spring away from said bag bottom downwardly toward the cylinderand into the path of grippers 7 7, I find that. greater certainty andprecision of operation is bad by bendlng said underfolded end 40downwardly by positioning means. For this pur- 13 has arm 16 fixedthereto and between the pose I have provided a reciprocating poker 24slidably mounted in mortise 25 in bar 21 and adapted to be movedrearwardly and preferably downwardly for bendingsaidundcrfolded bottomend 40- toward said cylinder 3. Said poker 24 hasa wedge shaped end 26for engaging the ba and the r arward end of said poker is sli dablysupported in bracket 27 upstanding from cross bar 28.

For reciprocating poker 24 cam 29 on-shaft 30 en ages roll 31 of arm 32fixed to shaft 33. film 320 also fixed to shaft 33, is connected topoker 24 by link 34. Spring 35 on poker 24 1s cfiicient to keep roll 31in contact with cam 29. Shafts 30 and 4 are geared together by equalgears 36, 37 respecti vely.

The 0 eration of my improved mechanismis as fol ows: A pile of bags 50having'been laced in position with the open ends of said a s on lips 19,and the closed or bottom ends on lips20 and their mid portions onturning bar 21, the body portions of said bags tend to sag, causing theunderfolded and bottom '.tom portion 40.

a (Fig. 7

portion 40 of the bottom bag to protrude slightly from body 41 thereof(Fig. 3). The machine being then started grippers 7, 7 begin to rotateoutwardly from within pocket 9 in cylinder 3 andpoker 24 moves rearwardl(to the right Fig. 4) its Wedge shape end 26 between bag body 4L1 andunderfolded bottom portion 40, poking said underfolded portiondownwardly 'in front of grippers '7', 7, (Fig. 4), without moving saidbag body relative to the bag pile supporting means. Said grippers asthey turn over toward their seats on cylinder 3 encounter the pile ofbags and slightly lift that pile during the engagement, of poker end '26with bottom portion e0, thereby affording ample room between the bagbodyfor the entrance of said grip pers (Fig. 5). Polier 24 now commences towithdraw and cylinder 3 has advanced until edge 48 of cavity 9'haspassed into approximate coincidence with the edgeof bag-bot-' Thereupon, grippers 7, 7 descend and grip said portion 40 to cylinder 3(Fig. .6). The bottom end of the bag is then withdrawn from lips 20(Fig. 1) and the open end of body portion 41 is withdrawn from lips 19.That portion of body 41 near the jointure with the bottom isthen foldedbackwardly onto bottom portion 42 and the main body portion is leddownwardly around rounded edge 22 of turning bar 21 onto cylinder 3ready for printing with its bottom side up, relative to its previousposition on the pile supporting means.

Iclaimzi 1. Feeding mechanism for paper bags whose bottoms have one endthereof folded backwardly onto their bodies respectively including incombination means for supporting a pile of bags, a moving receivingmember having bag-gr1pping means there means for bending the backwardlyfolded end of said bag-bottom downwardly into the path of thebag-gripping means and means for moving said receiving member toward theopen end of. the bag for withdrawing the bag from the pile supportingmeans and laying it on said moving member bottom side up relative to itspre-- vious position on the pile su porting means. "2. Feeding-mechanismfor paper bags whose bottoms have one end thereof folded onto'theirbodies E-respeotively, including in combination means for supporting apile of bags, a moving receiving member having bag-gripping meansthereon, means for bending the folded end of said bag-bottom downwardlyinto the path oftheba'g-gripping means, means for actuating the bagippin-means to grip said downwardly.

ent bag-bottom end to said receiving memher, a turning bar for thebag-body and means for movingsaidreceiving member to I(draw saidbag-body around said turning 3. Feeding mechanism for paper bags whosebottoms'have one end thereof underfolded relative to their bgdiesrespectively,

including in combination means for supporting a pile of bags, a movingreceiving .member having bag-gripping means thereon, means for bendingthe underfolded end of said bag-bottom downwardly into the path of thebag-gripping means, means for actuating the bag-gripping means to gripsaid downwardly bent bag-bottom end to said receiving member, 5 turningbar for the bag-body, means for moving said receiving member to drawsaid bag-body around said turning bar and for laying it on said movingmember, bottom side up relative to its previous position on the pilesupporting means. I

4.Feed1ng mechanism for paper bags- Whose bottoms haveone end thereoffolded backwardly onto their bodies respectively, including incombination means for supporting a pile of bags, a rotating cylinderhaving a gripper thereon, means for bending the backwardly folded end ofsaid bagbottom downwardly into the path of the cylinder gripper, meansfor actuating said gripper to grip said downwardly bent bagbottom end tosaid cylinder and means for rotating said cylinder toward the open endof said bag for withdrawing the bag from the pile supporting means andlaying it on said moving memberbottom up relative 'to its previousposition on means.

5. Feeding mechanism for paper bags the pile supporting whose bottomshave one end thereof folded onto their bodies respectively, including incombination means for supporting a pile of bags, a rotatingcylindenhaving a gripper thereon, means for bendingthe folded end ofsaid bag-bottom downwardly into the path of the cylinder gripper, meansfor actuating said gripper to grip said down: Wardly bent bag-bottom endto said cylin-" der, a turning-bar for rotating said cylinder fordrawlng said bag body around-said turning bar and for laying it on saidcylinder, bottom side up relative to its previous position on the pilesupporting means.

6. Feeding mechanism for paper bags whose bottoms have one end thereoffolded backwardly' onto their bodies respectively,

for the bag-body, means including in combination means for si 1pportinga pile of bags, a movingrecelvlng member having bag-gripping mean Itherewithdrawing the bag from the pile supporting means and laying .iton said moving member bottom side up relative to its previous positionon the pile supporting means.

7. Feeding mechanism for paper bags Whose bottoms have one end thereoffolded onto their bodies respectively including in combination, meansfor supporting a pile of bags, a moving receiving member havingbag-gripping. means thereon, means for actuating said bag-grippingmeans, a turning bar for ,the bag-body and means for moving saidreceiving member to draw said bag-body around said turning bar;

8. Feeding -mechanism for paper bags 'whose bottoms have one end thereoffolded backwardly onto their bodies respectively, means for support ng apile of bags, a moving receiving member havlng bag gripping meansthereon, means for bending the backwardly folded end of said bag-bottomdownwardly into the path of the bagripping means without moving the'bagody relative to the bag pile supporting means and means for movingsaid receiving member toward the open end of the bag for withdrawing thebag from the pile supporting means and laying it on said moving memberbottom sideup relative to its previous position on the plle supportingmeans.

Signed at Rumford, Maine, this 29'day of September, 1911, before twosubscribing witnesses.

WILLIS PIPPERT.

Witnesses:

CLAUDE F. BROWN, LEoroLn SGHONAUER.

Gopies o! thls'patent may be obtained for five cents each, by addressingthe Commissioner of latents.

. Washington, D. 0."

